      
      ΥɥȤ System V init ˤĤƤδñ
      פ򵭽ҤΤǤ
      
      ---------------------------------------------------------
      
     System V init ϥ֡Ȼ˥եȥγϤ椹
     ΤΤȤ  Linux ǤΥɤ
     ʤޤ
     ͳŪ BSD init ñ˻Ȥơ
     ǡĥ뤫Ǥ
      
     ǡˤäΤϤˤޤ(ͳϻ䤬
     ɤΤʤǤ:-)
      
      initΥХʥ /sbin ˤ졢 /etc ǤϤޤ
      ƥ󥹥ȡƥեޥåȤʤ˸ߤΥƥξ夫
      System V init ˥åץ졼ɤ褦ȤƤʤС
     ϤȤƤפʻǤLinux Υͥ init õ
       /etc ǽõޤǤ顢/etc ˸Ť init 
      ʤɤǧơ⤷äɬƤƲ
      
      SYSV init Ϥޤե뤬 /etc Υǥ쥯ȥ
      ƤΤФ/etc Υ֥ǥ쥯ȥ
      BSD init ȰۤʤޤΥǥ쥯ȥ rc.d
      ȸƤФޤΤʤ rc.sysinit ȼΥǥ쥯ȥ꤬
      ߤĤǤ礦:
      
      init.d
      rc0.d
      rc1.d
      rc2.d
      rc3.d
      rc4.d
      rc5.d
      rc6.d
      

      init.d ˤϡΥץȤޤޤƤޤ衢
      ưޤ̤ runlevel ˰ܹԤưӥ
      ˤĤĤΥץȤɬפǤӥϥͥåȥ nfs
      sendmail httpd¾ޤߤޤ setserial ͤˣ٤
      ưƽλƤޤΤϴޤߤޤ
      ϡrc.local ˵Ҥޤ

      ⤷ rc.local ɬפʾ /etc/rc.d ֤٤Ǥ¿
      ƥϡ򤵤ƤʤƤ⤳ޤߤޤۤˤ⡢
      ư˥ꥢݡȤФ̤ʻ򤷤 rc.serial
       /etc/rc.d ֤Ǥޤ
      
      ưΥ٥ȤήϼΤ褦ˤʤäƤޤ:
       o ͥ뤬Ĥξ init õơǽ
         ĤΤưޤ
       o init  /etc/rc.d/rc.sysinit ¹Ԥޤ
       o rc.sysinit ɬפʤȤ򤤤Ԥ
         (⤷)rc.serial¹Ԥޤ
       o init  rc.local ¹Ԥޤ
       o init ǥեȤ runlevel ƤΥץȤ
         ¹Ԥޤ

      ǥեȤΥ٥ /etc/inittab Ƿޤ
      Τۤ˼Τ褦ʹԤޤ:
      
      id:3:initdefault:
      
      줫顢ιԤΣĤΥߤơǥեȤ
      runlevelۤȤɤΥƥǤΥΤ褦ˡ
      3 Ǥ뤳Ȥ狼ޤ⤷ѹС/etc/inittab 
      Խ 3 ѹ뤳ȤǤޤinittab ꤬ȯ
      ȤˤϤʤ꿵ŤˤʤäƤ⤷ؤޤ򤷤顢
      ֡Ȥơ֡Ȥλ˼Τ褦ˤƲ:
      
      LILO boot:  linux single
      
      ǡ󥰥桼⡼ɤΩ夬褦ˤʤޤΤǡ
      inittab Ƥ

      ǡˤɤΤ褦˥ץȤɤΤ褦Ω夬äƤ뤫
      ߤƤߤޤ礦rc3.d ǡls -l 򤷤ƤߤȼΤ褦ʴ
      ʤäƤΤǤ礦
      
      lrwxrwxrwx 1 root root 17  13:11 S10network -> ../init.d/network
      lrwxrwxrwx 1 root root 16  13:11 S30syslog -> ../init.d/syslog
      lrwxrwxrwx 1 root root 14  13:32 S40cron -> ../init.d/cron
      lrwxrwxrwx 1 root root 14  13:11 S50inet -> ../init.d/inet
      lrwxrwxrwx 1 root root 13  13:11 S60nfs -> ../init.d/nfs
      lrwxrwxrwx 1 root root 15  13:11 S70nfsfs -> ../init.d/nfsfs
      lrwxrwxrwx 1 root root 18  13:11 S75keytable -> ../init.d/keytable
      lrwxrwxrwx 1 root root 23  13:11 S80sendmail -> ../init.d/sendmail.init
      lrwxrwxrwx 1 root root 18  13:11 S90lpd -> ../init.d/lpd.init
      lrwxrwxrwx 1 root root 11  13:11 S99local -> ../rc.local
      
      
      ŤȻפޤˤΡ֥եפϤޤ
      Ƥ init.d ˤ륹ץȤؤΰĤΥ󥯤ˤʤäƤޤ
      󥯤Υե̾ˤ "S"ȤʸȿƬդƤޤ
      "S" ϤΥӥϤȤ̣ "K" ϤΥӥ
      餻Ȥ̣ǤֹϤν֤ɽޤ init ɽ
      ֹ˴ŤƤΥӥ򳫻ϤޤƱֹȤäƤ
      ޤ󤬡ʻ򤷤Ƥ⼫ʬƱƤޤǤ礦
      ɬפʥӥϤ᤿ꤿˤä "S"  "K" μ
      2ĤοȤȤɬפʤǤ
      
      ɤΤ褦ˤƥӥ򳫻ϤߤΤǤ礦? ϴñǤ
      줾ΥץȤ "start"  "stop" Τɤ餫
      ȤƤ餦褦˽񤫤Ƥޤ
      ΥץȤºݤ˥ޥɥ饤Ǽư
      ưޤ:
      
      /etc/rc.d/init.d/httpd.init stop
      
       httpd Ф򥹥ȥåפǤinit ϥץȤ
      ̾ɤߡ⤷"K"ǻϤޤäƤСΥץȤ
      "stop" ĤƸƤӽФޤޤ "S" ǻϤޤäƤС
      "start" ĤƸƤӽФޤ
      
      
      ʤ runlevel ǴΡ
      
      Ӥ˥ޥꤹΤ˴ñˡ󶡤ޤ
      㤨С"server" ٥äơǤñ httpd
      sendmail networking¾ưޤơ"user"
      runlevel äơxdmnetworking¾ưޤ
      
      
      
      
